Finding the Third Proportional to 131,400 and 287,994

Step by Step Solution

1. Step 1: Write the proportion equation
   131,400 : 287,994 = 287,994 : x
2. Step 2: Convert to fraction form
   131,400/287,994 = 287,994/x
3. Step 3: Cross multiply
   131,400x = 287,994 × 287,994
4. Step 4: Simplify right side
   131,400x = 82,940,544,036
5. Step 5: Solve for x
   x = 82,940,544,036/131,400
6. Step 6: Final answer
   x = 631,206.58